How to convert Grayscale 8bit Imagefie(.jpg)??

[bboguni]

Hello.
We need to use jpg files in grayscale 8bit format.
But we don't get the RGB color we want.

I tried changing the format and many other methods, but failed.
The .jpg file itself should not be resaved.
Is there any workaround??

[silent]

bboguni

GPUs can handle only limited amount of textures/images (and there is no single-channel grayscale images support). So you need to convert your texture to a 3-channel RGB8 image in order to keep the gray color.

Thanks!